@article{DAN_1979_246_3_a10,
     author = {P. D. Krut'ko and Y. P. Popov},
     title = {Canonical transformations of the equations of motion of a dynamical system},
     journal = {Doklady Akademii Nauk},
     pages = {555--557},
     publisher = {mathdoc},
     volume = {246},
     number = {3},
     year = {1979},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1979_246_3_a10/}
}